All Apple Watch models feature an optical heart sensor but Series 4 adds an additional electrical sensor for taking electrocardiograms on the go with Apple's ECG app. Did you know you can use this sensor to improve your regular heart rate readings, no matter where you live?
Changing the region to United States in your iPhone's settings won't automagically make Apple's new ECG app appear on Apple Watch Series 4 for non-US customers.
Apple today released the watchOS 5.2.1 update which brought a brand-new ECG app for taking heart rate measurements that are not dissimilar from those recorded with a single-lead electrocardiogram, but you must be 22+ years old to use it.
Now that the ECG app is finally available for the Apple Watch (Series 4), we thought it'd be a good idea to offer a quick rundown of the much talked-about feature. So here is our guide to what the ECG app does and how to use it.
Apple today released the watchOS 5.1.2 software for all Apple Watch models, sans Series 0. As we indicated earlier, the update has brought a new on-demand ECG feature to Series 4 models.
Apple's ECG app that will permit Series 4 watch wearers to take an electrocardiograph reading on the go will release publicly as part of the watchOS 5.1.2 software update.